Upgrade from Win10 Pro to Win10 Enterprise dynamic group

Thanks for your reply Aaron. Unfortunately in this instance Autopilot won't work. The users are purchasing their devices through retail channels, so there's no way of knowing the hardware GUID to pre-stage them before hand. I have found a solution though. I posted the same question on technet, and someone simply mentioned why not make a group of users who will buy the machines, and assign the Edition Upgrade policy to them (instead of trying to dynamically identify the device). I know which users will be making the purchases, so I thought I'd give it a try and it works just fine. So this is the way I've done it now.